Math Calculator
Type any arithmetic expression and get the answer instantly.
All calculations happen locally in your browser — nothing is uploaded, stored or tracked.
Type an expression
e.g. (12 + 8) × 5 − 2^4
Watch it evaluate
Results update as you type.
Copy the answer
Use the copy button when you need the value elsewhere.
What Is a Math Calculator?
A math calculator evaluates an arithmetic expression you type, following the standard order of operations: parentheses first, then powers, then multiplication and division, then addition and subtraction. Unlike a basic keypad calculator, it handles whole expressions at once.
The expression parser also understands scientific notation (1.5e3), common functions such as sqrt, sin, cos, tan, log, ln, exp and abs, the constants pi and e, and the percent sign. Everything is evaluated locally — nothing is sent to a server.
Order of Operations
For example, 2 + 3 × 4 equals 14, not 20, because multiplication happens before addition. Use parentheses to force a different order: (2 + 3) × 4 = 20.
Your data never leaves your device.
Every calculation on this site runs in your browser using vanilla JavaScript. Nothing is uploaded, stored or tracked.
- 100% local, client-side calculations
- No data stored on any server
- No tracking, no analytics, no ads scripts
- Works offline once loaded
Frequently Asked Questions
What expressions can this calculator handle?
Numbers, + − × ÷, powers (^), parentheses, percent, scientific notation, constants (pi, e) and functions like sqrt, sin, cos, tan, log, ln and abs.
Does it respect order of operations?
Yes — parentheses, powers, then multiplication/division, then addition/subtraction, exactly like a standard scientific calculator.
How do I type a square root?
Use sqrt(9) or 9^0.5. The result is 3.
What does the percent sign do?
It converts a number to a fraction: 50% is evaluated as 0.5, and 200 × 15% equals 30.
Can it use variables?
No — it evaluates pure arithmetic expressions. For variable expressions such as derivatives, use the derivative or integral calculators.